listed species are those with: 1) 5 or fewer extant sites, or 2) fewer than 1,000 individuals, or 3) restricted to fewer than 4 U.S.G.S. 7 ½ minute topographical maps, or 4) species listed as endangered by U.S. Department of Interior.

Federal Protection:
Not Listed

State Rarity Rank:S1

A State Rarity Rank of S1 means: This plant is endangered/critically imperiled in New York because of extreme rarity (typically 5 or fewer populations or very few remaining individuals) or is extremely vulnerable to extirpation from New York due to biological factors.

Global Rarity Rank:G1

A Global Rarity Rank of G1 means: This species is critically imperiled globally because of extreme rarity (typically five or fewer known populations), very few remaining individuals, or is especially vulnerable to extinction because of some factor of its biology.

Did you know?
Calamagrostis perplexa is one of only a few plant species endemic to New York State, meaning that it is native only to our state and no where else in the world. However, it has recently been found near the Massachusetts border. With future fieldwork, new discoveries may compel New York botanists to share this globally rare species with our neighbors.

One site has had a population of several thousand stems (which may be one genetic individual) persist for at least 111 years. The other site was only recently discovered and so lacks long-term population trend data.